Re: pyPgSQL giving error!
> I am using Redhat 9.0/python2.3. I installed pyPgSQL-2.4.tar.gz and it > was successfull. Now when I am trying to import that module, I got: > Type "help", "copyright", "credits" or "license" for more information. from pyPgSQL import PgSQL > Traceback (most recent call last): > File "", line 1, in ? > File "pyPgSQL/PgSQL.py", line 391, in ? > from libpq import * > File "pyPgSQL/libpq/__init__.py", line 23, in ? > from libpq import * > ImportError: No module named libpq did you really do ./configure, make and make install? where is libpq.* was a postgres installation present while doing ./configure et all? -- http://mail.python.org/mailman/listinfo/python-list
Re: py2exe problem
Grant Edwards > LookupError: no codec search functions registered: can't find encoding > Googling for the error message will find you the answer. http://starship.python.net/crew/theller/moin.cgi/Py2Exe carries within "encodings" and "encodings again" receipes to get it working. A software development system which REALLY solves the encodings problem WITHOUT creating a swarm of new ones could would challange even my devotedness to Python : Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: py2exe problem
Thomas Heller <[EMAIL PROTECTED]> wrote in news:[EMAIL PROTECTED]: >> >> A software development system which REALLY solves the encodings >> problem WITHOUT creating a swarm of new ones could would challange >> even my devotedness to Python : > > AFAIK, McMillan Installer solves this by including all the encodings > stuff by default, and it has a --ascii flag to override this > behaviour. Would that be a solution? Thomas, I solved the headaches with py2exe and encodings, again and again ... even documented some of these steps within the wiki. But encodings still give me new pain any day: storing filenames to databases, displaying filenames in windows-controls, sending database-extracts to excel or word ... time on time encodings and/or unicode errors pop up and cause me misery. So my cryout is for a solution for all encoding-problems like the python for-loop or list-comprehensions: elegant, simple, robust, flexible. Easy to use, easy to implement. Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: py2exe problem
Thomas, > Would the above (include all encodings stuff by default) be a good > solution, or do you have other ideas? I assume a good solution would involve switching pythons default from "ASCII" to "UNICODE" :) But ... as far as py2exe is concerned, yeah, I think it would be helpfull to include all encoding by default (undefaultable, of course), or at least provide in the very very first simple setup.py example the include encodings.* stuff. Harald Armin -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there a market for python developers?
> I am new to python and took my first attempts at working with this > language today. Is there a market for people who work with Python? Absolutely no. Only unimportant and unknown companies like Google, Nokia, Industrial Light and Magic as well as GHUM Harald Massa do work with Python. Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: Java RMI-like services in Python
Maurice LING <[EMAIL PROTECTED]> wrote in news:dbfmbq$e49$1 @domitilla.aioe.org: > I am wondering if Python has services or frameworks that does the same > as Java RMI? google for pyro Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: Py: a very dangerous language
"yoda" > It was 6 a.m just one more lambda...I'll really sleep > now...seriously... I've got to go to work in a few hours I also love Python deeply, and really enjoyed the intense description of your experience. One experience I won and wanna share with you: allways go to bed exactly when you want to write the first lambda. That has 2 benefits: you get sleep, and your programs less lambda. Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: Python dutch
Sybren Stuvel , > I'd suggest learning English. The programming language is based on > English anyway. There should be one-- and preferably only one --obvious way to do it. Although that way may not be obvious at first unless you're Dutch. To be even more exact, it would help to learn or even be Dutch to program in Python, as those quoted lines out of the ZEN might suggest. Harald -- http://mail.python.org/mailman/listinfo/python-list
Googling for wmi and python....
I upgraded Python to 2.4 now the game really starts, looking all over the internet for all the packages ... I needed Tim Goldens WMI ... and googeld, dropping there: http://www.microsoft.com/technet/scriptcenter/scripts/python/misc/wmi/defau lt.mspx With comment: Sample scripts for retrieving WMI configuration information. These sample scripts were written using Python for Windows. For sample scripts written using VBScript, please visit the Script Repository home page. And that is above Tims GREAT WMI.module ... just wanted to drop that note. -- http://mail.python.org/mailman/listinfo/python-list
overwriting method in baseclass
Hello! I am using a library (= code of so else) within Python. Somewhere in this library there is: class foo: def baa(self, parameters): print "something" self.baazanan(some other parameters) class mirbo(foo): def baazanan(self, lalala): print "heylo tada" class fujiko(foo): def baazanan(self, ltara): print "sing a song with me" now I want to change the common baa-method. so that def baa(self, parameters): print "soemthing special" self.baazanan(some other parameters) Of course, I use a Python- and GPL-Licence compatible library, I can change the source of foo, and use my changed library. But someday, it happened before, there will be an update by the publisher to that library and I have to do all again. So, what is the most elegant solution to administer these changes? Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: overwriting method in baseclass
bruno modulix <[EMAIL PROTECTED]> wrote in > >> So, what is the most elegant solution to administer these changes? > > > Use a version control system (svn is quite fine...). > Thanks for that recommendation, I really do use subversion for some time. But how can I use it to solve this problem? I do changes to the common baseclass which is OUTSIDE my development. I quite correctly assume that the developers of the classlib also use Subversion, alas, having no public access. So HOW can SVN be of any use for THIS prob? Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: overwriting method in baseclass
marc, >> So HOW can SVN be of any use for THIS prob? > > Take a look at the Subversion documentation (the "book") and search > for `Vendor branches`. > [...] > The section deals specifically with the situation how to manage 3rd > party source code with subversion which you want to update from time > to time and even apply some modifications. thank you very much for pointing this out! I did not even dare to hope to find sth. of this kind with a rcs for MY software. So I did not even start searching. Thank you, Harald -- http://mail.python.org/mailman/listinfo/python-list
head for grouped data - looking for best practice
Old, very old informatical problem: I want to "print" grouped data with
head information, that is:
eingabe=[
("Stuttgart","70197","Fernsehturm","20"),
("Stuttgart","70197","Brotmuseum","123"),
("Stuttgart","70197","Porsche","123123"),
("Leipzig","01491","Messe","91822"),
("Leipzig","01491","Schabidu","9181231"),
]
shall give: ( Braces are not important...)
'Stuttgart', '70197'
--data-- ('Fernsehturm', '20')
--data-- ('Brotmuseum', '123')
--data-- ('Porsche', '123123')
Leipzig', '01491'
--data-- ('Messe', '91822')
--data-- ('Schabidu', '9181231')
my first approach was:
from itertools import groupby
from operator import itemgetter
for key, bereich in groupby(eingabe,itemgetter(0)):
print "Area:",key
headnotprinted=True
for data in bereich:
if headnotprinted:
headnotprinted=False
print "additional head info", data[1]
print "--data--", data[2:]
leading to:
Area: Stuttgart
additional head info 70197
--data-- ('Fernsehturm', '20')
--data-- ('Brotmuseum', '123')
--data-- ('Porsche', '123123')
Area: Leipzig
additional head info 01491
--data-- ('Messe', '91822')
--data-- ('Schabidu', '9181231')
which is quite what I expected. But ...
if headnotprinted:
headnotprinted=False
print "additional head info", data[1]
REALLY looks patched, not programmed.
my second try was:
def getdoublekey(row):
return row[0:2]
for key, bereich in groupby(eingabe,getdoublekey):
print "Area:",key
for data in bereich:
print "--data--", data[2:]
which indeed leeds to the expected result, while looking less "hacky" ..
on the other hand side, that "getdoublekey" ist not very flexible; when
doing the same with 3 Columns forming the head information, I have to
define the next function...
gettriplekey(row):
return (row[1], row[0], ---yadda yadda yadda
so, what is the best recommended practice for this usual problem within
Python?
Harald
--
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Re: How to send browser to open a different URL
"Mike Wimpe" <[EMAIL PROTECTED]> wrote in news:1110628448.532469.117000 @g14g2000cwa.googlegroups.com: http://groups.google.de/groups?hl=de&lr=&c2coff=1&threadm= 2c60a528.0309251324.109d4af5%40posting.google.com&rnum=5&prev=/groups%3Fq% 3Dhttp%2520redirect%2520header%2520python%26hl%3Dde%26lr%3D%26c2coff%3D1% 26sa%3DN%26tab%3Dwg -- http://mail.python.org/mailman/listinfo/python-list
Re: head for grouped data - looking for best practice
Steve, > Why don't you just pass a slice to itemgetter? py> for key, bereich in groupby(eingabe, itemgetter(slice(0, 2))): WHOW, that is great! that makes it really simple, just have to structure the SQL to make a real "cut first, serve first" structure. Thanks to all who helped! also the "function factory function" bei Dietz was very helpfull; and Peters classes looked really impressive! Thanks again... now my code will be even clearer. Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: Beware complexity
Philip, more often than not, all needed was included in Python years ago. Especially: > I wonder if anyone has any thoughts not on where Python should go but > where it should stop? The answer is included within the standard library. On any Python command prompt type: >>>import this The Zen of Python, by Tim Peters Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex. Complex is better than complicated. Flat is better than nested. Sparse is better than dense. Readability counts. Special cases aren't special enough to break the rules. Although practicality beats purity. Errors should never pass silently. Unless explicitly silenced. In the face of ambiguity, refuse the temptation to guess. There should be one-- and preferably only one --obvious way to do it. Although that way may not be obvious at first unless you're Dutch. Now is better than never. Although never is often better than *right* now. If the implementation is hard to explain, it's a bad idea. If the implementation is easy to explain, it may be a good idea. Namespaces are one honking great idea -- let's do more of those! > Nothing wrong with coding conventions of course unless you: So "coding conventions" are more or less rendered as something of ancient times; Python has its Zen. (of course, as I said, included in the standard library) And: the fear that Python gets extended over sensible bounds maybe real. But: Just have a look within python.devel, what happens on any (pun intended) extension to builtins: It's a gentle and polite, nontheless strong and hard discussion; a real evolutionary survival test. Python is a healthy tree: it grows. But Guido and the Bots are thoughtfull gardeneres: they are not afraid to cut bad branches. Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: Use macros in Excel via win32com
chris, > I'm creating an excel document dynamically from scratch using Python > and the win32com module. All is well, but now I need to add a macro to > the spreadsheet and run it (to enable some sorting features in the > spreadsheet). I recommend to create the excel document not from scratch but from a template. I learned from experience that it is speadier to have all the static parts allready prepared - and especially diagrams and macros are MUCH easier to handle if allready in the programm Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: Example Code - Named Pipes (Python 2.4 + ctypes on Windows)
"Srijit Kumar Bhadra" <[EMAIL PROTECTED]> wrote in > Here is an example of Multithreaded Pipe Server and Client using the > excellent ctypes library (Windows). Excellent. Maybe you would also like to post it to the http://starship.python.net/crew/theller/moin.cgi/CtypesModule Ctypes-Wiki for easier reference? best regards, Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: a=[ lambda t: t**n for n in range(4) ]
Mage <[EMAIL PROTECTED]> wrote in news:mailman.2339.1114242211.1799.python- > The "lambda functions" was an unclear part of the tutorial I read. > Should I use them? Are they pythonic? > As far I see they are good only for type less a bit. And to obfusicate code. lambda is evil, do not play with it. Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: query progress bar
> it's for wx, the problem isn't making the progress bar itself, it's
> knowing how long the query is going to run for.
> i'm using pypgsql
It is quite easy:
from timemachine import oracle
guesser=oracle(guess="SQL")
guesser.set_hint(driver="pypgsql")
guesser.set_hint(gui="wx")
expected_runtime=guesser.estimate("")
Only problem is that the timemachine module is currently only installed
on Guidos and Tims Python.
Harald
--
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Re: Dealing with marketing types...
> They want a > "scalable, enterprise solution" (though they don't really know what > that means) and are going crazy throwing around the Java buzzwords > (not to mention XML). > There is a very cheap solution: Ryan Tomayko debunkes all these myths. You can google it up, "astronaut architects" There is a cheap solution: on this years EuroPython (www.europython.org) there will be a special Slot in Social Skills track dealing with "Selling Python", giving you a Python Sales Pitch and two more excellent seminars about persuading people. More than that, in Python in Business Track we will do slots about using Python for real worthy enterprise apps which scale and are FULLY buzzword-compatible. Join us! Harald Armin Massa GHUM Harald Massa perusasion. python. postgresql. -- http://mail.python.org/mailman/listinfo/python-list
